How To Mount/use A Norton Diamond Wheel....

[brino]

Hi all,

Over the years I have collected a number of brazed carbide lathe bits. Some were acquired in a "dull" state, some I have used enough(or incorrectly ) to dull.

So I started thinking about have a way to sharpen them. More out of interest and challenge than necessity.
I asked at my local new/used machinery place and ended up with a Norton diamond wheel for $25.

It is marked:
271880
ASD220-R75B56-1/16
MAX RPM 3025
Made in USA.

I did not measure it because I thought the dimensions would be in the part number. Now I know better.
I believe it is about 10 inch over-all diameter with a 3 inch hub hole and is 1/2 inch thick (wide).

From deciphering the part number based on the Norton abrasives e-catalog:
http://www.nortonindustrial.com/upl...talog-Superabrasives-8068-2014 Bookmarked.pdf
ASD is the abrasive type; 220 is the grit size; the rest has to do with grade, bonding, etc.; 1/16 inch abrasive depth.

Seeing the blue plastic wheel made me think it was a low-end wheel. I cannot find it in a Norton catalog, but the closest thing I've found is this very expensive wheel:
http://www.ebay.com.sg/itm/111635166608?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Any idea what type of machine this was made for?
Any suggestions for mounting? I am considering a two part aluminum hub to bolt onto/thru the plastic hub.
Can the bottom of the wheel run in a coolant? (ie. will is pick it up the coolant, or would I need a drip/spray application?)
Then I just need to figure out a speed reducer....

The plastic hub looks like it's been around a bit, but the diamond at the outside circumference looks unused.
Thanks for any help.

-brino

 

[Ulma Doctor]

i think it would make a nice disc for sharpening your carbide. the diamond will be a bit coarse- but for lathe tools i think you might be OK.
i'd consider a 1750 RPM 1/4 to 3/4 HP single phase motor ( or DC motor with variable drive in the same HP rating) for the powerplant
you'll need to make or buy a hub for mounting.
the wheel should be able to run in coolant or be manually sprayed on.
the slower you turn the wheel, the less coolant is needed.
at 1750 rpm you wouldn't need any speed reduction, but it wouldn't hurt if the wheel ran slowly.

as long as the plastic hub is still in good shape, i say RUN IT!!!!

you may need to fabricate a rest of some sort for holding the tool to be ground, it doesn't have to be super intricate if you're just doing lathe bits

 

[Vladymere]

The diamond wheel is good for sharpening carbide but the steel subsurface of brazed carbide tools is not good for the wheel. Overheating the wheel by to great a speed or lack of coolant will melt the diamonds into the the wheel substrate.

Vlad

 

[brino]

Thanks for the replies!

one update, I got home and measured it and it's actually a 12 inch outside diameter with a 5 inch hub hole.
-brino

 

[JimDawson]

That's a large surface grinder wheel size, for a 36 inch or bigger grinder.

 

[Ulma Doctor]

WOW that's a lot of wheel... a bigger challenge than i originally anticipated... i gotta think on this one